我正在创建一个在线词典 Android 应用程序。我正在使用 JSON 来请求用户输入的单词的定义。每次单击搜索按钮时，此输入都会输入到变量“文本”中。然后将输入的单词附加到返回定义的 API 请求 URL 中......它存储在底部方法 OnPost Execute() 的变量“结果”中，然后我的 TextView 应该设置为此字符串。
因此，我将整个 JSON 和 HTTPrequest 代码放在 onClickLIstener 中，因为用户输入总是在每次都更改和请求，但是在“public JSONObject lastTweet（String word）”之后的“throws ClientProtocolException”处出现错误，错误是“语法错误在令牌上，删除这些令牌”我正在使用 Enclipse Indigo。
这是我的代码：
public class Dictionary extends Activity {
String finalresult;
HttpClient client = new DefaultHttpClient();
TextView ansa;
JSONObject json;
Button Search;
EditText input;
String text;
final static String URL = "http://api.wordnik.com/v4/word.json/";
final static String URL2 = "/definitions?api_key=<MY API KEY>";
String fresult;
Dictionary dic = new Dictionary();
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.dictionary);
ansa = (TextView) findViewById(R.id.ansa);
input = (EditText) findViewById(R.id.input);
Search = (Button) findViewById(R.id.search);
Search.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
text = input.getText().toString();
public JSONObject lastTweet(String word)
throws ClientProtocolException, IOException, JSONException{
new Read().execute("text");
StringBuffer strBuff = new StringBuffer();
strBuff.append(URL);
strBuff.append(word);
strBuff.append(URL2);
HttpGet get = new HttpGet(strBuff.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();
if (status == 200){
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONArray timeline = new JSONArray(data);
JSONObject last = timeline.getJSONObject(0);
return last;
}else{
Toast.makeText(Dictionary.this, "error", Toast.LENGTH_LONG);
return null;
}
}
class Read extends AsyncTask<String, Integer, String>{
@Override
public String doInBackground(String... params) {
// TODO Auto-generated method stub
try {
json = lastTweet(text);
return json.getString(params[0]);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
fresult = result;
// TODO Auto-generated method stub
}
}
ansa.setText(fresult);
}
});
}
public JSONObject lastTweet(String word)
throws ClientProtocolException, IOException, JSONException{
new Read().execute("text");
StringBuffer strBuff = new StringBuffer();
strBuff.append(URL);
strBuff.append(word);
strBuff.append(URL2);
HttpGet get = new HttpGet(strBuff.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();
if (status == 200){
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONArray timeline = new JSONArray(data);
JSONObject last = timeline.getJSONObject(0);
return last;
}else{
Toast.makeText(Dictionary.this, "error", Toast.LENGTH_LONG);
return null;
}
}
class Read extends AsyncTask<String, Integer, String>{
@Override
public String doInBackground(String... params) {
// TODO Auto-generated method stub
try {
json = lastTweet(text);
return json.getString(params[0]);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
fresult = result;
// TODO Auto-generated method stub
}
}
}
有什么建议么？